i'm curious to know if on the S5's the rear NA calipers and the rear T2 calipers are the same? i've got a full set of single pistons all around on my car right now cuz it started life as an NA but i recently got a hold of a set of T2 calipers. i'm just wondering if i should bother changing the rears or are they the same? thanks.

 

Check your rotors to see if they are solid or vented.

If they are vented then they are the same as TII.